Cage-making machine



Feb. 4, 1930. E. E. HAWKINSON ET AL CAGE MAKING v MACHINE 2 Sheets-Sheet Filed Aug. v29, 1927 INVENTORS 5071/ E A aal/nhsan and/VPd W Barb/v ve a ATTdRNEY 1930- I E. E. HAWKINSON ET AL 1,745,852

' CAGE MAKING MACHINE Filed Aug. 29. 1927 2 Sheets-Sheet 2 p 34 XVNW v f I i I 3 33 26 4 'fy' 5 39 A ATTO'RNEY Patented F eb. 4, 1930 UNITED STATES man. E. nnwxmsonnnn NED w. BUBBRIDGE, or soo'rn BEND, 'INDIANA, ASSIGNORS mownsrmorronsn nnncrnrcf AND MANUFACTURING COMPANY, A conronnrrron or PENNSYLVANIA j v Our invention relates to the art of rein- *forcing concrete and-it hasparticular rela- --ti on to machines suitable formaking relnforci 1g cages for concrete poles.

7 i spirally wound wire and the rods are wired together at their junctions to provide a rigid structure.

' Heretofore,in winding the spiral wrapping wire, the rods weresupported on a mandrel which was provided with suitably spaced,

rigidly fastened discs for engaging the rods.

After-the spirally wound wrapping is completed, however, the rods are tightly engaged on the discs and removal of the finished cage I Itis, ther fore, an object of our invention 7 to provide a machine for expediting the manufacture of such reinforcing cages.

Another object of our invention is to provide a machine such that thefinished cage ma 'be easily withdrawn from the mandrel. Still other objects ofour. invention will become apparent from the following description of the structure and operation of our device.

. In the accompanying drawing, Figure 1 is an elevational view of ourreinforcing cage making machine, a-portion of the structure being shown as broken away in order to illustrate thecomponent parts in greater detail;

I Fig. 2is a cross-sectional view of the faceplate assembly of our cage-making machine; Fig-3 is a view, partially in cross-section and partially in elevation, of oneof the supports forholding the reinforcing rods in place v on the mandrel ofthe cage-making machine,

and I 1 v I .Fig. 4 is a .end view, partially in elevation and partially in section,of the support shown in Fig. 3.

telescoping of the two pipes permits lengthmeans of a switch arm 13 to which is attached pins 23 adapted to engage suitable openings PATENT A oFFIcE CAGE-MAKING MACHINE Application filed August 29, 1927. Serial No; 216,090.

Referring to Fig. 1, our cage-making machine comprises a lathe bed 1 upon whlch are mounted the usual drlving motor 2 and head stock 3. The'tail stock 4 is of different construction from the tail stock known to the art and its construction and operation will be hereinafter described.

I The mandrel 5 upon which the cage is wound is supported by. two stub shafts 6 and 7, which are respectively carried by the head stock 3 and the tail stock 4. p

' The mandrel 5 comprises two sections of pipe, a large-diameter pipe 8 and a small diameter pipe 9, the relative sizes being such that-the small pipe makes a snug fit with the 3 large one. The pipes may be moved with relation to one another'by heating the large pipe and thus expanding it to permit relative motion of one pipe within the other. Such '65 ening or shortening the mandrel to accommodate different length cages. The mandrel is driven through suitable reduction gearing 12 from the motor 2, which is controlled by a pull rope 14, so that the motor may be controlled from any position along the length of the lathe be o The face plate 15 (see also Fig. 2) for supporting the reinforcing rods 16 comprises two members, a fixed plate 17 rigidly attached to the mandrel shaft and provided with slots 21 about its peripheral edge,'and alongitudinally' slidable plate 22 provided with stripper 8O 24 in the fixed plate, so that when the movable plate is forced to the'right the reinforcing rods 16 are driven longitudinally out of engagement with the slots in the fixed plate.

The fixed face plate 17 is provided with a collar 25 fastened about the mandrel and havmovable-face plate and the flange of the first named collar and being prevented from rotating by means of a strap 31 which engages the lathe bed. A forked lever arm 32 is pivotally mounted on the slidable collar 27 and is provided with cam surfaces 33 (Fig. 2) such that when the lever arm is forced to the right the cam surfaces cause the slidable faceplate 22 J therein. The high-points 39 of the end sur- 1 to drive the reinforcing rods 16 out of engagement with the fixed face plate 17 A spring 34 is preferably disposed between the fixed and the slidable face plates in order to prevent accidental engagement of the strip per pins with the reinforcing rods and to withdraw. the stripper pins from the openings 24 after the finished cage has been disengaged from the'mandrel. V

A number of supports35, such as shown in detail in Fig. 3, are provided at suitable intervals along the mandrel. These supports comprise a disc 37 fastenedto the mandrel. Clevisj members 38 are. fastened to this: disc and providea pivotal support 36 for a plurality of dogs 40; The ends of the dogs areprovided with a notched V-shaped surface so that the reinforcing cage rods may be supported faces of the dogs lie close to the face: of the disc, so that when the dog is against the disc,

tated by hand byinserting levers in the openings 54and turning the disc.

In making a cage, thelongitudinal rods 16 are placedin the slots 21 in the faceplate 17 and on the dogs 40 of the supports 35. The

engaginghooks '49 are then dropped into place so that they engage the outer surfaces.

of the rods and hold them against the V- shaped surfaces of the dogs. The springs 51 v cause the hooks to engage the rods until manually-released. When the hooks are, moved "outwardly by means of the handlesf52, the

springs 51 are then displaced sufliciently s0 that the rodsmay be removed. v p 1 Iron wireis wound around the: rodslfi beginning at the head stock3, by operating motor 2. Thelastfew'turns are wound by turning the mandrel and cage by hand, as has been I previously explained. When the iron. wire has been wound on therods it is fastenedto them by meansofsmall'eriron wire; 58." Any suitable means may be employed in fastening thewire 'on'thel'longitudinal rods 16, but we r p i V Whenha reinforcing cage has been confllprefer to use a bagtie tool, well known in the v p from the mandrel and thrownbackout of the the radially inward pressure of the rod will tend to keep the dog in the engaged position.

' To further aid in keeping the dogs in engaged position, a slidabledisc 41 is provided with a flange 42 which engages the exposed face of v the dogs and holds them against the face of the disc 37 A collar 43 is also'heldon the mandrel by means of screw 44', and a spring 45,disposed between tlieslidable collar 41 and the stationary collar 44, is adapted to drive the slidable disc against the dogs. I

When the reinforcing rods are first placed on the mandrel, it is necessary to holdcthem hooks'are engaged on the rods, thespring forms, with the hooks, a toggle structure which is adapted toholdthe hooks in'engaged position. I I

The tailstock4 (Fig.1) is mounted on a "heavyrod 55 which is fastened to the lathe bed. The rod is located backto the center line of the lathe and the tail stock may be swung up and back out of engagement with the mandrel. lWhenthetail-stok isin operative posi- .tion, it isheld ,down by a latch mechanism 56.

The tail stock stub shaft 7 is provided with a disc 53 at its inner end forsupporting the ends of the reinforcing rods. Openings 54 are provided in the periphery of the disc and, consequently, the-reinforcing cage may be roas has 'beenthereinbefore described, and the lever arm 32 is driven by means of. a suitable ,pleted, the tail stock is loosened,'disengaged way.- o v The holding hooks 49 are then disengaged,,-.95-

lever-toithe right so that the cam surfaces 33 V 'of the lever arm are caused to force the slid- .abl e face plate 22 into substantial engagement;- with thefixed faceplate17, thus causing-the stripper pins 23 to drive the reinforcing rods '16 out of engagement with the fiXed-.,face

plate. The longitudinal motion of therein- 7 forcing rods causes the dogs 40 onthe sup;

ports 35 to be turned about'their pivots 36 thus disengaging the reinforcing rods.

5 Our device provides improved means for manufacturing reinforcing cages. The cages may'be readily and quickly made and the I ent re process 'consumesless time an'd'thus 'PIOVlClQS a structure Wlll0l1 is inexpensive in cost. 7

act

Although we have described a specific mo'd- I ification of our device, other .modifications may be made by those skilled: in the art. For I instancd'theslidable collar of the supports 35 may be dispensed'with. Other means may be. used to disengage the rodsfrom' the fixed face plate 17. These andotlier modifications be made wt-hout departing from the 1sp1r1t'andiscope of, our invention as defined in the appended claims. V VVe'clann as our invention;

' 1. In a cage-makingmachine, a lathe bed,

a mandrel carried by the :lathe bed, a. driving motor and reduction gearing mounted on the lathe bedfor driving the mandrel, s-a face 7 plate mountedfon the mandrel'for' supporting one end of the rods of'saidcage,-a.plurality sliding plate comprisingacam and lever.

1. of supports spaced along said mandrel, and a disc for supporting the other end of the reinforcing rods, said disc being adapted to tam be manually rotated. J

2. Ina cage-making machine, means, for holding the reinforcing rods of the cage in 7 place comprising a disc, dogs radially disposed on said disc,.andghooks for holding said rods in engagement with said discs.

, 3. In a cagegmaking machine, a mandrel, means for holding theocage in place on the mandrel comprising a fixed face plate and a plurality of supporting members, and means I plate, stripper pins attached to said slidable 1 face plate, and means for slidingsaid slidfor driving said cage longitudinally out of engagement with said "holding means, said driving means comprising a slidable face ing face plate towards said fixed face plate to engage saidstripper pins with said cage. 4; In a cage-making machine, a support for reinforcingjrods comprising a mandrel, a

supporting member mounted on said man s a drel, dogs movably fastened to said support- 1 ing member and adapted to support said reinforcingrods when the dogs are in engaged position against the said supporting member, and means for holding said dogs in engaged position. 7

5. In a cage-making machine, a support I for reinforcing rods comprising a mandrel, a supporting member mounted on said mandrel, dogs movablyfastened to said supporting member and adapted to support said rew inforcing rods when the dogs are 1n engaged position against the said supporting mem.

her, and means for holding said dogs in engaged position, said holding means comprising a slidable collar adapted to engage said dogs.

6. Ina cage-making machine, a support for reinforcing rods comprislng a mandrel,

a supporting member mounted on said mandrel, dogsmovably fastened to said supporting member and adapted to support said reinforcing rods when the dogs are in engaged position against the said supporting member, means for holding said dogs in engaged position and holding means for engaging said rods with said dogs.

- 7. In a cagesmaking machine, means for s o disengaging a finished cage comprising a mandrel, ajfixed faceplate having a collar portion 'mount'ed on' said mandrel; and provided with slots about its periphery for supporting the reinforcing rodsof said cage, a

slidable face plate provided with stripper j pins adapted to disengage said rods from said fixed face plate when said slidable face plate is" engaged and means for engaging said cam and lever.

In testimony whereof, we have hereunto subscribed our names this 20th day of August, 1927.

Iv EMIL E. HAWKINSON.

NED W. BURBRIDGE.

V 8. In a cage-making machine, means for disengaging "a finished cage comprising av mandrel, a fixed face plate having a collar I portionmounted on said mandrel andprovid- 

